Description
Massive concrete coring bits shake hand-held tools violently and induce severe operator fatigue during high-volume commercial installations. The Makita 40V max XGT Rotary Hammer Kit 1 9/16in AVT powers large carbide core bits through structural slabs without user fatigue. A 40-volt brushless motor delivers 5.9 foot-pounds of impact energy. Coring hard river rock without downforce trips electronic limiters.
Die-cast magnesium gear housings enclose an air-cushioned striker assembly supported by double-row cylindrical roller bearings. Anti-Vibration Technology incorporates an internal counterbalance system that reciprocates opposite the drive piston to cancel mechanical recoil. The brushless motor wet-end features heavy copper stator windings and rare-earth rotor magnets that shed thermal build under continuous drilling. Active Feedback-sensing Technology decouples the motor if bit rotation suddenly halts.
AVT Rotary Hammer Hardware Specs
Internal mechanical counterbalances cancel striker vibration before it reaches operator hand grips. Active Feedback-sensing Technology decouples the motor instantly during bit bind-up events.
- 1.562-inch solid bit capacity cuts commercial structural anchor holes in reinforced slabs
- 5.9 foot-pounds of impact energy shatters high-strength concrete aggregate effortlessly
- 40-volt brushless motor platform maintains high drilling cadence under continuous load
- Anti-Vibration Technology counterbalances cancel reciprocating shock inside the tool chassis
- Active Feedback-sensing Technology shuts down motor power instantly during bit snag events
- SDS-max drive chuck locks large core bits and demolition chisels securely without slip
- Two-mode operation selector switches between hammer drilling and hammer-only demolition chipping
Hammer Dyno Bench Readings
Bench power analyzers track electrical current draw and impact energy across high-strength cured concrete. Running unloaded, the 40-volt battery draws 2.2 amperes, climbing to 24.6 amperes while driving a 1-1/2-inch bit. Battery pack terminal voltage drops from 40.2 volts down to 35.6 volts under peak hammering resistance. Striker cadence hits 2900 BPM under active load. Sound level meters read 94 dBA at the operator position. Gearcase temperatures rise 26 degrees Fahrenheit after fifteen holes.
Field Service Operational Traps
Neglecting bit shank grease causes high-friction galling that seizes expensive SDS-max bits inside the chuck. Finish carpenters hanging drywall trim have no need for this heavy concrete hammer. Never hammer drill into reinforced slabs without checking the electronic clutch status light.
- Grease bit shanks with high-temperature chisel paste before inserting into the chuck.
- Wipe concrete dust off the rubber chuck nose cone after every shift.
- Clean battery terminal contact tracks using dry nylon bristle brushes every week.
Commercial Warranty Package Inventory
Makita backs this rotary hammer kit with a 3-Year limited commercial warranty. The full kit includes the 40-volt rotary hammer, one 40-volt 4.0Ah battery, rapid charger, depth gauge, side handle, grease tube, and heavy wheeled case.
